I took a 7 day dose of Levaquin which ended Tuesday Aug.5th 500mg 1x per day. by the 2nd day both achilles tendons began tightening up making it difficult to walk. by day 7 began looking for info online to see what was happening only to find the Levaquin was the cause. Physician prescribed voltarin 75mg 2x per day said I should be better 2-3 days. So far no change (day 2) still sore